Re: [PATCH] mmc: core: Imply IOSCHED_BFQ

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On Wed, Feb 1, 2023 at 2:19 PM Arnd Bergmann <arnd@xxxxxxxx> wrote:

> > diff --git a/drivers/mmc/core/Kconfig b/drivers/mmc/core/Kconfig
> > index 6f25c34e4fec..52fe9d7c21cc 100644
> > --- a/drivers/mmc/core/Kconfig
> > +++ b/drivers/mmc/core/Kconfig
> > @@ -37,6 +37,7 @@ config PWRSEQ_SIMPLE
> >  config MMC_BLOCK
> >       tristate "MMC block device driver"
> >       depends on BLOCK
> > +     imply IOSCHED_BFQ
>
> As with most other uses of 'imply', this one does not do what you
> think it does. Enabling MMC_BLOCK in 'make menuconfig' or similar
> won't actually turn on IOSCHED_BFQ implicitly. The only difference
> this makes is that it gets enabled in a 'make defconfig' run when
> IOSCHED_BFQ is not already configured.

Incidentally that is all I do in my life, so it works as expected for me...
but OK.

> Just put it into the defconfig files instead.

Given that ARMv7 and ARM64/aarch64 often has MMC/SD-cards
I suppose I will start sending patches for these.

I see that m68k, MIPS Loongson, sh, um and s390 (!!) has already
enabled it in their defconfigs.

Yours,
Linus Walleij



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